Final answer:
The number of people remaining in the garden after killing 30 is 4 people.
Step-by-step explanation:
The question states that you were in the garden and there were 34 people in the yard. If you killed 30 people, then the number of people remaining in the garden would be:
34 - 30 = 4 people
Therefore, option A) 4 people is the correct answer.