On Monday morning, Jim told six friends a secret. On Tuesday morning, those six friends each told the secret to six other friends who did not know it. The secret continued to spread in this way on Wednesday, Thursday and Friday mornings.

The total number of people (not counting Jim) who will know the secret on Friday afternoon is

**A.** `259`

**B.** `1296`

**C.** `1555`

**D.** `7776`

**E.** `9330`