Health experts strongly advise patients with hypertension to avoid food ______ amounts of fat.

Knowledge: Participle clauses

Detailed solution:

Simplify the active relative clause: remove the relative pronoun and change the verb into the form V_ing

Full form: Health experts strongly advise patients with hypertension to avoid food which/ that contains high amounts of fat.

Short form: Health experts strongly advise patients with hypertension to avoid food containing high amounts of fat.

=> Medical experts strongly recommend that hypertensive patients avoid foods high in fat.

Choose A.