The correct option is C Would you buy, had
A sentence that begins with 'if' is a conditional. These sentences refer
to hypothetical situations, 'what could happen' and 'what we wish would
have happened'.
The given sentence is also a conditional. It's a
type 2 conditional, which means that the if-clause is a hypothetical
condition (if the person had money) and the main clause is
its probable result (would the person buy the sports car, as a result). In this type, the
tenses used are:
main clause (present conditional) + if-clause (simple past)
The given sentence is interrogative in nature, hence it asks the result and does not state the result.
Option C: The verb 'would you buy' presents a present conditional, 'would' refers to the condition, and 'had' is in
simple past. It adheres to the requirement for type 2 conditional.
Hence C is the correct option.
Option A: 'Will you buy' refers to the future tense, but the given sentence is a conditional. 'Were having' is a continuous tense that sounds strange.
The former is wrong because it does not present a conditional. Since it's a hypothetical situation, the future cannot be certain. The latter is wrong because the tense of the
if-clause must be in the past.
Option B: Similarly, 'will you be buying' refers to a future
action, whereas it should refer to a hypothetical result indicated by 'would'.
Option D: Have' Will not break' refers to a present action and 'would you buy' refers
to the present conditional. But, as mentioned above, the condition (if-clause)
cannot be a present action, leaving the result (main clause) as a hypothetical result.
The meaning thus formed is ambiguous.
Hence options A, B and D are incorrect.