i think it is d, i hope this helped~ :)
Assuming we're just looking at this phrase, "learn'd" suggests that the astronomer studied to become intelligent in the astronomical field.
Answer:
În română vă rog frumos să-mi trimiteți și mie o problemă
Answer:
use insect repellent.
wear long sleeved shirts and pants.
use windows and door screens.
sleep with a bed net.
stay in air conditioned rooms.
avoid areas with still or stagnant water.
Explanation: These are all ways of preventing an insect born disease
