Oleke Manufacturing Received $800 in Advance on January 1 from Zinger

Oleke Manufacturing received $800 in advance on January 1 from Zinger Company for services to be performed over the next 3 months.If the $800 received from Zinger Company was placed into the Unearned Revenue account,and Oleke had completed 30% of the work as of the end of the month,what adjusting entry would Oleke Manufacturing make on January 31?

A) $\begin{array} { l l l } \text { Prepaid revenue } & 240 & \\\text { Revenue } & &240\\\end{array}$

B) $\begin{array}{lccc}\text { Revenue } & 240 & \\\quad \text { Unearned revenue } & & 240\\\end{array}$

C) $\begin{array}{lccc}\text { Unearned revenue } & 240 \\\quad \text { Revenue } & & 240\\\end{array}$

D) $\begin{array}{lccc}\text { Revenue }&560 \\\text { Unearned revenue } && 560 & \\\end{array}$

E) $\begin{array}{lccc}\text { Unearned revenue } &560 & \\\quad \text { Revenue } & &560 & \\\end{array}$