Answer:
cluster system
Step-by-step explanation: For edgunity
Answer:
An odd number times an even number is always even
e.g 2 × 3 = 6
4 × 5 = 20
adding 1 to an even number makes it odd
6 + 1 = 7
20 + 1 = 21
hope this helps...
The answer should be either b or d but i’m not too sure