Final answer:
d) 16. The number 6000000000000002 has 16 significant figures.
Step-by-step explanation:
The number 6000000000000002 has 16 significant figures. Zeros located between non-zero digits are significant and count towards the total number of significant figures. In this case, all the zeros are located between non-zero digits, so they are all significant. Therefore, the correct answer is d) 16.