(Table: Fazio and Gabriella's Opportunity Cost) the Table Provides Data

(Table: Fazio and Gabriella's opportunity cost) The table provides data on how long it takes Fazio and Gabriella to learn to play a particular new song on the piano and to complete a given person's tax return. Use the data to answer the question.
Fazio's opportunity cost of learning the song is _____, and Gabriella's opportunity cost is _____.

A) two tax returns; 1.25 tax returns
B) .5 of a tax return; .8 of a tax return
C) nine hours; two hours
D) .8 of an hour; .5 of an hour