C. a slope must be forever climbed.
Answer:
an description of the texts citation
Explanation:
an additional piece of information printed at the bottom of a page .they cite references or comment on a designoted part of the text above it.
A, B, and D begin statements that can stand by themselves logically. C begins a statement that shows how the previous statement and itself are connected. As such, the answer is C(As a result).
First to spend more time with the family, second because that way we could do more things in the summer, and third because teachers need long vacations
