Final answer:
The hypothesis being tested is concerning the population of community college students in California, as they are trying to infer about this specific group based on the sample data collected.
Step-by-step explanation:
The hypothesis for the data collected is being made about the population of community college students in California (Option B). This is because the California Community College Chancellor’s Office is interested in the proportion of their students who receive federal grants, and they are comparing their findings to a known percentage of community college students nationwide. The sample of 1,000 students is used to infer about the larger population of California community college students, rather than the entire population of community college students in the United States or just the sampled students themselves.