II and IV appears to be the best option. II would improve air quality while III would improve the water. IV is a good option too. I doesnt really apply so you can rule out anything with I
Answer:
Explanation:
The governments and the press of the Western Bloc were more inclined to refer to themselves as the "Free World" or the "Western world", whereas the Eastern Bloc was often called the "Communist world or Second world".
Answer:
PS = RT, PQ = ST Give?
PQ+QS=PS Segment Addition
ST+QS=RT False - should be ST + QS = PS by Substitution
RS+ST=RT Segment Addition
ST+QS=RS+ST Equal of equals are equal
QS=RS Subtraction Property of Equality
Because of the error in 3 the proof is incorrect, i.e. QS ≠ RS
Explanation: