The question is technically ambiguous because both @import and @font-face can be used when working with external fonts.
@import can import an external stylesheet that contains a font definition (for example, a Google Fonts CSS file), while @font-face directly defines a custom font and specifies the external font file using src: url(...). Therefore, both options can be technically correct depending on the intended method.
…or Am I putting to much mind into this?
keep in mind this exercise is dynamic. you may need to quit and start this test again.