In July 2020, your logistics firm received 58 customer orders and delivered 48 of them on time. Meanwhile, 55 customer orders were sent to your firm in August 2020 of which 46 were delivered on time. What would be your correct conclusion about your firm's on time delivery performance? Make sure you justify your answer with the proof of calculation.

a. My firm's on time delivery performance in July is better than that in August

b.My firm's number of customer orders received in August is higher than that in July

c. My firm's on time delivery performance in August is better than that in July

d. My firm's number of customer orders received in July is higher than that in August