It can be inferred from the passage that ______A.vanillin is easier to synthesize than ben
It can be inferred from the passage that ______
A.vanillin is easier to synthesize than benzaldehyde
B.not all synthetic flavors are harmless
C.in general, the less components there are in a fragrance, the harder it is to synthesize
D.synthesized substances must be tested for safety only if they are used in food