Correct Option: D

heavy (Adjective) : weighing a lot; very busy; difficult to do
handy (Adjective) : easy to use or to do; useful; skilful in using your hands; easy to reach
cumbersome (Adjective) : large and heavy; heavy to carry; slow and complicated
handful (Noun) : the amount of something that can he held in one hand; a small number of people or things
unwieldy (Adjective) : difficult to move or control; cumbersome