in which statement is the transition used correctly?

select one:

a. gold in california ignited interest in a railroad to reach the west. as a result, americans disagreed on where to build the railroad.

b. gold in california ignited interest in a railroad to reach the west. however, americans disagreed on where to build the railroad.

c. gold in california ignited interest in a railroad to reach the west. therefore, americans disagreed on where to build the railroad.

d. gold in california ignited interest in a railroad to reach the west. before this, americans disagreed on where to build the railroad.

Accepted is to fact as unproven is to

Judy blume's career as an american writer spans four decades and includes many literary awards. she is most famous for her novels geared toward pre-teens. one notable example is tales of a fourth-grade nothing. however, blume also has had success writing for an adult audience. three of her novels for adults reached the new york times best-seller list. in a 2008 interview blume remarked, "i have so many stories left to tell! " by that time she had written nearly 30 novels. judy blume is an exceptionally talented and productive american author. which of the following statements supports the main idea in this paragraph? blume only publishes books that she expects will win awards. blume prefers to write novels for adults rather than pre-teens. blume has had an extremely and uncommonly long writing career. blume is a gifted writer who can write for children as well as adults.

Ihave no idea what the explanation is.