Answer:
c
Step-by-step explanation:
Margin of error = Critical Value × Standard Error
We work out critical value from the information of confidence interval.
We have 95% confidence interval, hence the z-score (that is the critical value) is 1.96 (refer to the picture below)
Standard Error =
Standard Error =
Margin of error = 1.96 × 1.46 = 2.87 (rounded to 2 decimal place)