When was mitochondria developed

What can be said about farmers in highly developed countries? a) they have little or no negative impact on the environment. b) they practice subsistence agriculture. c) they are able to incorporate polyculture into their farming practices. d) they utilize organic farming techniques on a regular basis. e) they rely on large amounts of energy from fossil fuels.

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

What is true of sea slugs in these orders