I believe the correct answer would be (b)
Ensuring the safety of the people after the earthquake struck would be the main priority. Make sure there would be no occurrence of tsunami before deploying rescue operations. I would immediately deploy all of the necessary health equipment and personnel to the affected areas. Rescue operations must be started also to save those who were trapped by debris. Also the removal of live electrical wires is really important.
Answer:
All of the lines of longitude to the west of the prime meridian until 180 degrees are in the western hemisphere. Ninety degrees west is a line that passes through North America, including Lake Superior and the Yucatan Peninsula.