Based on context clues, what is the best definition of the word "expendable”? necessary to an operation knowledgeable about a topic capable of being sacrificed useless in a specific situation

Based on context clues, what is the best definition of the word "expendable”?

From the options given, the best definition of the word "expendable" is the third one: capable of being sacrificed.

Explanation:

The word expendable referred to something of relatively little significance, and therefore able to be abandoned or destroyed. It is referring to something that is not truly necessary.

the president was the speaker and it was a great part of history.

explanation:

video of the national aeronautic space administration's (nasa) coverage of president john f. kennedy’s address at rice university, houston, texas, concerning the nation's efforts in space exploration. in his speech the president discusses the necessity for the united states to become an international leader in space exploration and famously states, "we choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard."

i think sylvia like her but she not trying to show it and i think rainbow will forgive her.

explanation: