Answer:
His main objective was to overthrow the Cuban President, Fidel Castro
Explanation:
After President Kennedy assumed office, he was let in on a plan designed to overthrow Castro. The plan involved giving different military training to Cuban exiles and then sending them to invade Cuba and defeat Castro. Kennedy's advisors assured him that the plan would work but Castro got wind of the plan and only 300 out of 1,200 people sent survived the onslaught. The failure in the plan created more tension between the United States and other communist countries.
I am unable to see the exact choices you are supplied with, but frank refers to saying or establishing something sincerely and bluntly.
46 you could've googled this btw