Answer:
Option D is correct
Step-by-step explanation:
The cost of purchasing the 100 shares was $20 per share, in other words, the total amount paid for the stock acquisition is $2,000($20*100).
However, the later shares were sold for $3,000($30*100), which means that capital gain is the difference between the sales value and the acquisition value.
Capital gain=$3,000-$2,000=$1000
The correct option is D