AP statistics is this correct? Thank you!

You construct a sample in which Whites, Blacks, and Latinos are randomly selected from the U.S. adult population. The composition of your final sample is 25% White, 30% Black. and 30% Latino. You've sampled from all over the country, but the actual composition of the population has a much higher proportion of Whites. This is likely an example of a: @voluntary response sample. multi- stage cluster sample. Ofstratified random sample. convenience sample. simple random sample