In a wrinkle in time book why was calvin chosen for this mission?

Explanation:

Meg tells Calvin that the family hasn't heard from their father for a year now, and Calvin alludes to all the rumors that the townspeople circulate about Mr. Murry's whereabouts. ... Charles Wallace suddenly appears, announcing that it is time for them to leave on their mission to find Mr. Murry.

i'm pretty sure i had this question the other day and b was the right answer.

there is a sequence and logical steps to give an answer of a trouble.

1) strategy is necessary to develop an project idea.

2) to study and know the environment where you are going to work ( ecosystem).

3)   the materials resources to built the ideas.

4) to give a priority order in the context that you study. in this case human needs.