Does the sentence "The reddish-brown streaks so common in hickory and certain other woods are mostly the result of injury by birds." provide a valid answer to the question "What causes the black checked pattern in the wood of western hemlocks?"

A: no

Does the sentence "It concluded that "the crisis was avoidable and was caused by: widespread failures in financial regulation, including the Federal Reserve's failure to stem the tide of toxic mortgages; dramatic breakdowns in corporate governance including too many financial firms acting recklessly and taking on too much risk; an explosive mix of excessive borrowing and risk by households and Wall Street that put the financial system on a collision course with crisis; key policy makers ill prepared for the crisis, lacking a full understanding of the financial system they oversaw; and systemic breaches in accountability and ethics at all levels"." provide a valid answer to the question "Who was not prepared for the financial crisis in 2007 by lacking a full understanding of the financial system?"

A: yes

Does the sentence "However, revolutionary activities against the British rule took place throughout the Indian subcontinent and some others adopted a militant approach like the Indian National Army that sought to overthrow British rule by armed struggle." provide a valid answer to the question "What leader started a mass movement against British rule?"

A: no

Does the sentence "Greenhouses remain an important part of horticulture today, and plastic transparent materials have also been used to similar effect in polytunnels and row covers." provide a valid answer to the question "What do greenhouses do with solar energy?"

A:
no