The writer wants to add a phrase at the beginning of sentence 7 (reproduced below), adjusting the capitalization as needed, to provide a logical connection between the conclusion stated in sentence 6 and the claim made in sentence 7. The study of sleep learning was largely abandoned for 50 years.

Which of the following phrases should the writer add?

In addition,
A

As a result of these findings,
B

Surprisingly, however,
C

For reasons still poorly understood,
D

With the earlier studies thus confirmed,
E