Key concept: Friedel–Crafts reaction

Friedel–Crafts alkylation/acylation occurs best with aromatic rings that are activated toward electrophilic substitution.

• Electron-donating groups increase the yield.
• Electron-withdrawing groups decrease the yield.
• Strongly deactivated rings usually do not give good Friedel–Crafts reaction.
• Also, groups like $-NH_2$ may coordinate with $AlCl_3$ and suppress the reaction.

Problem with the given question

The options are shown only as:

• A:
• B:
• C:
• D:

but the actual compounds are missing.

Therefore, it is not possible to independently evaluate which substrate gives the highest yield in Friedel–Crafts reaction.

What would normally be checked

To decide the correct option, we would compare:

• whether the ring is activated or deactivated,
• whether the substituent complexes with $AlCl_3$,
• steric hindrance,
• and whether rearrangement or polyalkylation is likely.

Comparison with stored answer

Since the structures/options are absent, I cannot verify from chemistry reasoning alone that option A is correct.

So I must conclude that the question data is incomplete.