Answer:
I would say d.
Explanation:
According to Newton's First law "Every object continues either at rest or in constant motion in a straight line unless it is acted upon by a net force."
You can by planting mint or dandelions<span> </span>which will attract lacewings and ladybug which will eat the aphids. I would know because I had the same problem and planting those plants helped.
Your answer most likely will be LONG-TERM