Which of the following religions was the basis for the other a, christianity, b, islam, c, judaism, d, none of the above?

The correct answer is D. These three are separate religions, however, they all believe in the existence of one God. Christians are divided in protestants, roman catholics and orthodox. Muslims, those under the islamic religion are either in the Sunni group or Shia group. Lastly the jews have several divisions, such as Hasidic, Conservative and Reform Judaism.

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.