On January 1, 2017, Marianne Corp. purchased $50,000, of Robin Ltd.'s 4%, 10-year bonds for $48,000, since the market interest rate was approximately 4.5%. The bonds pay interest on January 1 and July 1. Marianne has a calendar year end, and classify the bonds as long-term investments.The fair value on December 31, 2017 was $48,500. Marianne sold the bonds on January 2, 2018 for 48500 The adjusting entry for interest on December 31, 2017, is:

a) No entry required

b) Cash 1000

Long-Term Investments 82

Interest Revenue 1082

c) Interest Receivable 1000

Long-Term Investments 82

Interest Revenue 1082

d) Interest Receivable 1000

Long-Term Investments 80

Interest Revenue 1080