Final answer:
For tax purposes, the cost basis for the customer's ABC shares is $73 per share and the sales proceeds of their exercised call option are $75 per share.
Step-by-step explanation:
When the customer writes the ABC Apr 75 call for $2, they generate additional income. If the ABC stock subsequently moves higher and the customer is exercised, their cost basis remains the same at $73 per share.
Therefore, the correct statements for tax purposes are:
- Cost basis is $73 per share.
- Sales proceeds are $75 per share.
So, the correct option is (I and III).
L