Residents in Port-au-Prince complained of extreme shaking during the earthquake, while residents of Santo Domingo, the capital of the Dominican Republic that sits 150 miles east of Port-au-Prince, assumed the shaking was caused by the passing of a large truck. Based on the Modified Mercalli Intensity Scale, the residents of Port-au-Prince most likely experienced an intensity of , while the residents of Santo Domingo experienced an intensity of . a. VII, II b. VIII, III c. X, III d. X, IV
What is the answer according to the Modified Mercalli Intensity Scale? 
\begin{tabular}{|c|l|} \hline Intensity & Characteristics \\ \hline I & Shaking not felt under normal circumstances. \\ \hline II & Shaking felt only by those at rest, mostly along upper floors in buildings. \\ \hline III & Weak shaking felt noticeably by people indoors. Many do not recognize this as an earthquake. Vibra- tions similar to a large vehicle passing by. ? \\ \hline IV & Light shaking felt indoors by many, outside by few. At night, some were awakened. Dishes, doors, and windows disturbed; walls cracked. Sensation like heavy truck hitting a building. Cars rock noticeably. ? \\ \hline V & Moderate shaking felt by most; many awakened. Some dishes and windows broken. Unstable objects overturned. ? \\ \hline VI & Strong shaking felt by all, with many frightened. Heavy furniture may move, and plaster breaks. Dam- age is slight. ? \\ \hline VII & Very strong shaking sends all outdoors. Well-designed buildings sustain minimal damage; slight-moderate damage in ordinary buildings; considerable damage in poorly built structures. ? \\ \hline VIII & Severe shaking. Well-designed buildings sustain slight damage; considerable damage in ordinary build- ings; great damage in poorly built structures. ? \\ \hline IX & Violent shaking. Well-designed buildings sustain considerable damage; buildings are shifted off foundations, with some partial collapse. Underground pipes are broken. ? \\ \hline X & Extreme shaking. Some well-built wooden structures are destroyed; most masonry and frame structures are destroyed. Landslides considerable. ? \\ \hline XI & Few structures are left standing. Bridges are destroyed, and large cracks open in the ground. \\ \hline XII & Total damage. Objects thrown upward in the air. \\ \hline \end{tabular}