Which one of the following choices correctly identifies all of the listed situations for which there is a non-zero acceleration?
Situation I : A point object moves in a straight line with increasing speed.
Situation II : A point object moves in a circular path with constant speed.
Situation III : A point objects moves in a circular path with decreasing speed.
(A) Situations I, II, & III
(B) Only Situations I & III
(C) Only Situations II & III
(D) Only Situation III
(E) Only Situation I