Does the sentence "In 1975, Sadat shifted Nasser's economic policies and sought to use his popularity to reduce government regulations and encourage foreign investment through his program of Infitah." provide a valid answer to the question "What was largely ignored and upset many of Sadat's polidy?"

A: no

Does the sentence "The equation may be expressed as ratios, or, by taking the logarithm (base 2) of both sides, by addition, using the APEX system, in which every increment of 1 is a doubling of exposure; this increment is commonly known as a "stop"." provide a valid answer to the question "What is used to discover the right exposure parameters?"

A: no

Does the sentence "Dialects differ in the different degrees of vowel reduction, and the incidence of the pair / e/." provide a valid answer to the question "What is the vowel system of Catalan?"

A: no

Does the sentence "No song spent more than six weeks at #1 on this chart during the 1980s, with nine songs accomplishing that feat." provide a valid answer to the question "Along with electronic pop, what type of music was the most successful in the 1980s?"

A:
no