Read this excerpt from "President Kennedy's Speech at Rice University." It is for these reasons that I regard the decision last year to shift our efforts in space from low to high gear as among the most important decisions that will be made during my incumbency in the office of the Presidency.

What does incumbency mean as it is used in this excerpt?

dominance

experiment

short visitation

time of service

okay pls

time of service

Explanation:

Incumbency as it is used in the excerpt means "time of service". Incumbency in the office of the president means that President Kennedy will hold the position as the presidency during his tenure until someone else is elected during another election when his tenure ends who will then take over from him.

Therefore, the correct option is D "time of service".

yes its like krisnis like in the air force .