Summarization
Directions: The paragraph is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Spell out the missing letters of the word. 

Dr. Brad Hager, a professor of Massachusetts Institute of Technology and co-author of the 1993 Nature paper with Donnellan, said precise Earth surface movement data from space can measure strain in the Earth's crust and can provide a good first approximationof of where earthquakes are likely.
B from space-based instruments.