Correct Option: B

retain (Verb) : to keep something; to continue to have something ; preserve
abandon (Verb) : to leave ; to for sake ; to give up
regain (Verb) : to get back something you no longer have, especially an ability or a quality
remain (Verb) : to continue to exist ; to be still in the same state or condition
revive (Verb) : to become, or to make somebody/something become conscious/healthy and strong again