Advanced American English Quiz; Lesson 4; Part 3;

Level up your English from basic to intermediate and advanced.
American English Quiz, Lesson 4. Part 3.
Which group lacks connection in meaning?
inexorably, relentless, inevitable, beyond influence
mandate, authority, enforce, impose
oust, depose, expel, displace
rigorous, medieval, oppressive, intimidating

Which group explicates “advocate“?
hit the nail on the head, accurate, precision
proclamation, announcement, statement, declaration
recommend, endorse, champion, plead
provision, pertaining, summit, myth