Carlos is conducting a survey on campus. One of his questions asks students to report how healthy they are on a scale of 1 to 5, where 1 = not healthy at all and 5 = very healthy. When he looks at the data he sees that most people rated their health as a 4 (somewhat healthy) or 5. What type of data did Carlos collect? Group of answer choices a. Ordinal b. Ratio c. Nominal d. Interval