Final answer:
In a Connect Four game, there are a total of 42 pieces, as each of the two players has 21 pieces.
Step-by-step explanation:
The total number of pieces in a Connect Four game is 42. Each player has 21 pieces, and since there are two players, the total comes to 21 pieces per player times two players. Therefore, the answer to the question of how many total pieces there are in a Connect Four game is option b. 42.