Final answer:
The Save the Butterflies Foundation would report B) $1,600 as temporarily restricted contributions in the current year.
Step-by-step explanation:
The Save the Butterflies Foundation would report $1,600 as temporarily restricted contributions in the current year. Temporarily restricted contributions are donations that have restrictions placed on them by the donor for a specific purpose. In this case, the $1,000 received for butterfly research and the $600 received for the building fund are restricted for those specific purposes. Therefore, the total amount of temporarily restricted contributions is $1,000 + $600 = $1,600.