Question #N1164

The following text is from a news report about a research project in the field of climate change: The Intergovernmental Panel on Climate Change (IPCC) has issued a report that details the impact of human activity on climate change. The report, which was compiled by hundreds of scientists from around the world, has found that climate change is happening faster than previously anticipated. In addition to the effects of climate change on the planet, the report also explores the potential impacts on human societies, including changes to food security and water availability. Which choice completes the text so that it conforms to the conventions of Standard English?

The report, which was compiled by hundreds of scientists from around the world, ______ found that climate change is happening faster than previously anticipated.
A. has
B. have
C. had
D. having