Final answer:
The greatest common factor (GCF) of the terms 108d² and 216d is 12d.
Step-by-step explanation:
To find the greatest common factor (GCF) of the terms 108d² and 216d, we need to factorize the terms and identify their common factors.
Step 1: Factorize 108d². 108 can be factored as 2² * 3³. d² remains unchanged.
Step 2: Factorize 216d. 216 can be factored as 2³ * 3³. d remains unchanged.
Step 3: Identify the common factors. We see that 2² * 3³ is a common factor of both terms.
Therefore, the GCF of 108d² and 216d is 12d. Hence, the correct answer is A) 12d.