Answer: B) Not garlicky enough
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Explanation:
According to Emily, there needs to be 8 cloves of garlic in every 500 mL of sauce. This means 1 clove of garlic will need 500/8 = 62.5 mL of sauce.
Multiplying that by 12 gets us 12*62.5 = 750 mL. So Emily thinks that 12 cloves of garlic need 750 mL of sauce.
However, Raphael has 900 mL of sauce. This will make the final result not garlicky enough according to Emily's recipe.
Put another way: Raphael has 900/12 = 75 mL of sauce for each clove of garlic. Having more sauce per clove will dilute the effect or strength of the garlic.
If Raphael had less than 750 mL of sauce, then it would be too garlicky, ie it would mean the garlic would be too strong to overpower the other ingredients. He would need to have exactly 750 mL of sauce if he had 12 cloves of garlic, in order for the two recipes to have the same strength of garlic.