The correct verb form is A. "Climbs."
The other verbs in the sentence use the present tense form, so the verb "climb" does too. The verbs used are "barks" and "gets." So the correct verb form should be "climbs."
➜︎Question
how did African Americans overcome adversity during World War II
➜︎Answer
American Soldiers in World War II Helped Pave Way for Integration of US Military
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