According to george vaillant, which factor outweighs the others with regards to predicting a happy, active old age?

the answer is a. monarch

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.

answer; albert bandura;

answer; they both highlight the power of the situation in determining behavior;