Which of the following is true?a. Salt wedging mostly happens in humid regions. b. The angle of repose is the same for all materials. c. Weathering can only take place on the surface of bedrock. d. Chemical weathering is more effective in arid than in humid climates. e. None of the above is true.

3. lithuania, latvia, and estonia all a.)signed a peace treaty with germany in 1996 b.)signed a pact with russia in 1996 c.)were admitted to the european union in 2004 d.)were damaged by the chernobyl explosion in 1986

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.

Can someone me with this plz? ! i'm putting 20 points on it!