Answer:
The right option should be (d) but it should be circumference instead of Circumfrace(spelling mistake).
Please note it is CIRCUMFERENCE.
Step-by-step explanation:
Okay, let us fill in the gap in the question above. Please note that the capitalized word is the missing word in the question:
"During the hellenistic period , a method was devised for calculating the CIRCUMFERENCE of the earth".
The Hellenistic period is a period between 323 BC to 30 BC. The term "Hellenistic period" is being used to describe the time in which Alexander the great died, the fall of the empire Alexander buit and the period or time in which the Roman empire was built, the conquest of Rome which include the the conquest of Egypt by the Roman empire.
The devised a method which is known as the Eratosthenes' method in order to calculate the circumference of the earth.