Which BEST explains why candidate Barack Obama made this decision? A
He did not want to limit how much money he could raise for his campaign.
B
He wanted to use only his own money to run for office.
O
С
He wanted to show who contributed to his campaign.
D
He did not want to campaign in every state.

He wanted to use only his own money to run for office C.

Explanation:

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.