Given the task definition and input, reply with output. In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

Fact1: an anemometer is used to measure wind speed, Fact2: If wind speeds exceeded 73 mph, the storm is upgraded to a hurricane., Question: What is occurring when when an anemometer shows a reading above 73 mph (A) rainfall (B) A rainstorm (C) it increases (D) precipitation (E) winter (F) Low pressure (G) A drought (H) A hurricane
H