Which statement best explains why an effective research question needs to be specific?
a. it makes the question possible to answer.

b. it makes it easy to identify keywords.

c. it makes it easy to tell what the question is asking.

d. it makes it possible to evaluate the sources.

How did the construction of the erie canal improve transportation in the united states in the 1820s? a. the canal connected the great lakes to the mississippi river. b. the canal connected the great lakes to the ohio river. c. the canal connected the atlantic and pacific oceans. d. the canal connected the great lakes to the atlantic ocean.