Which letter would you choose for the section in parentheses? Grandpa could punch in the (time, and the channel) of his favorite daily news program, and the TV would turn on that program at the proper time.

What letters?

You would capitalize, or choose, T in time, or C in channel, being in parentheses.

In the sentence, "Grandpa could punch in the (time, and the channel) of his favorite daily news program, and the TV would turn on that program at the proper time," the letter "T" would be appropriate for the section in parentheses.

To arrive at this answer, you can analyze the context and meaning of the sentence. The phrase within parentheses indicates that Grandpa has the ability to input two pieces of information: the time and the channel. Since "Time" starts with a capital letter, it suggests that the first word in the parentheses should also start with a capital letter to maintain consistency. Therefore, the suitable choice is "Time."