You are given a passage. You need to construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) its answer is the whole paragraph. Avoid creating questions that can be answered correctly without actually understanding the paragraph.
Example: Optical mice use an LED and a camera to rapidly
capture images of the surface beneath the mouse.
The infomation from the camera is analyzed by a
DSP (Digital Signal Processor) and used to detect
imperfections in the underlying surface and
determine motion. Some materials, such as glass,
mirrors or other very shiny, uniform surfaces
interfere with the ability of the DSP to
accurately analyze the surface beneath the mouse.

Since glass is transparent and very uniform, the
mouse is unable to pick up enough imperfections in
the underlying surface to determine motion.
Mirrored surfaces are also a problem, since they
constantly reflect back the same image, causing
the DSP not to recognize motion properly. When the
system is unable to see surface changes associated
with movement, the mouse will not work properly.
Example solution: why doesn't an optical mouse work on a glass
table?
Example explanation: The passage talks about the glass and mirror surfaces beneath the optical mice and how the mouse is unable to pick up enough imperfections in the underlying surface to determine motion. The last line of the passage explains why the mouse will not work properly on these surfaces. Thus it is a positive example.

Problem: Tennis bracelets, also known as diamond line bracelets, are thin, elegant pieces of wrist jewelry that feature a symmetrical pattern of diamonds. Unlike charm bracelets, they lack pendants or mementos.
According to numerous web sites, such as Professional Jeweler Magazine and Normans of Mosman, tennis star Chris Evert was known for her diamond line bracelets. She lost one during the 1987 U.S. Open, and the game had to be temporarily halted while she prowled the court for it. The "tennis bracelet" incident sparked a new name for the item, as well as a huge jewelry trend.

Following in the footsteps of the great Chris Evert, last year Serena Williams wore a custom-design Harry Winston tennis bracelet at the U.S. Open. According to the press release, "Winston added an extra secure safety clasp to the bracelet to make sure the flexible and fluid piece will stay securely on Williams' 7 and one-half inch wrist."

Regards

Paradiso
Solution: Why are tennis bracelets called tennis bracelets?