Question: The predecessor of Abul-Hasan was in charge of what unit? 

Context paragraphs:
Prime Minister's Strategy Unit: The Prime Minister's Strategy Unit (often referred to simply as The Strategy Unit) was an elite unit based in the UK Cabinet Office between 2002 and 2010 (with its predecessor unit dating back to 1999).  The Strategy Unit was established by the former Prime Minister Tony Blair, forming one part of a more streamlined centre of government along with a Delivery Unit (headed by Sir Michael Barber, focused on the delivery of public service targets), a Policy Unit (whose heads included David Miliband and Andrew Adonis, providing day-to-day policy advice) and a Communications Unit (headed by Alastair Campbell and later David Hill).

Charge density: In electromagnetism, charge density is a measure of electric charge is the amount of electric charge per unit length, surface area, or volume, called the linear, surface, or volume charge density, respectively.  The respective SI units are C⋅m, C⋅m or C⋅m.

Abu Mohammad al-Adnani: Taha Subhi Falaha (Arabic: طه صبحي فلاحة‎ ‎ ; 1977 – 30 August 2016), known as Abu Muhammad al-Adnani al-Shami (Arabic: أبو محمد العدناني‎ ‎ ), was the official spokesperson and a senior leader of the Islamic State of Iraq and the Levant (also called the Islamic State or ISIS).  He was described as the chief of its external operations.  He was the second most senior leader of the Islamic State after its leader Abu Bakr al-Baghdadi.  Media reports in August 2016 suggested he was in charge of a special unit, known as the "Emni", that was established by ISIL in 2014 with the double objective of internal policing and executing operations outside the ISIL territory.

Marginal revenue: In microeconomics, marginal revenue (R') is the additional revenue that will be generated by increasing product sales by one unit.  It can also be described as the unit revenue the last item sold has generated for the firm.  In a perfectly competitive market, the additional revenue generated by selling an additional unit of a good is equal to the price the firm is able to charge the buyer of the good.  This is because a firm in a competitive market will always get the same price for every unit it sells regardless of the number of units the firm sells since the firm's sales can never impact the industry's price.  However, a monopoly determines the entire industry's sales.  As a result, it will have to lower the price of all units sold to increase sales by 1 unit.  Therefore, the marginal revenue generated is always lower than the price the firm is able to charge for the unit sold, since each reduction in price causes unit revenue to decline on every good the firm sells.  The marginal revenue (the increase in total revenue) is the price the firm gets on the additional unit sold, less the revenue lost by reducing the price on all other units that were sold prior to the decrease in price.

Statcoulomb: The statcoulomb (statC) or franklin (Fr) or electrostatic unit of charge (esu) is the physical unit for electrical charge used in the esu-cgs (centimetre–gram–second system of units) and Gaussian units.  It is a derived unit given by

Abul-Hasan Al-Muhajir: Abul-Hasan Al-Muhajir is the official spokesman of the Islamic State of Iraq and the Levant (ISIL).  Abul-Hasan is the successor of Abu Mohammad al-Adnani, who was killed while visiting the Aleppo frontlines in Syria in August 2016.  An unintentional US airstrike is believed to have killed the former spokesman.

Electronvolt: In physics, the electronvolt (symbol eV, also written electron-volt and electron volt) is a unit of energy equal to approximately joules (symbol J).  By definition, it is the amount of energy gained (or lost) by the charge of a single electron moving across an electric potential difference of one volt.  Thus it is 1 volt (1 joule per coulomb, ) multiplied by the elementary charge ("e", or ).  Therefore, one electronvolt is equal to .  Historically, the electronvolt was devised as a standard unit of measure through its usefulness in electrostatic particle accelerator sciences because a particle with charge "q" has an energy "E" = "qV" after passing through the potential "V"; if "q" is quoted in integer units of the elementary charge and the terminal bias in volts, one gets an energy in eV.

Voltage: Voltage, electric potential difference, electric pressure or electric tension (formally denoted ∆"V" or ∆"U" , but more often simply as "V" or "U", for instance in the context of Ohm's or Kirchhoff's circuit laws) is the difference in electric potential energy between two points per unit electric charge.  The voltage between two points is equal to the work done per unit of charge against a static electric field to move the test charge between two points.  This is measured in units of "volts" (a joule per coulomb).

Electric charge: Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field.  There are two types of electric charges: "positive" and "negative" (commonly carried by protons and electrons respectively).  Like charges repel and unlike attract.  An absence of net charge is referred to as "".  An object is negatively charged if it has an excess of electrons, and is otherwise positively charged or uncharged.  The SI derived unit of electric charge is the coulomb (C).  In electrical engineering, it is also common to use the ampere-hour (Ah), and, in chemistry, it is common to use the elementary charge ("e") as a unit.  The symbol "Q" often denotes charge.  Early knowledge of how charged substances interact is now called classical electrodynamics, and is still accurate for problems that don't require consideration of quantum effects.

Abcoulomb: The abcoulomb (abC or aC) or electromagnetic unit of charge (emu of charge) is the basic physical unit of electric charge in the cgs-emu system of units.  One abcoulomb is equal to ten coulombs.

Supporting paragraphs: Abul-Hasan Al-Muhajir Abu Mohammad al-Adnani
Answer: "Emni"