Assume the configuration: A ---------------- B --------------- C where A-B has an MTU of 2100 bytes and B-C has an MTU of 700 bytes. Assume that link layer frames require 30 bytes of overhead, an IP header is 20 bytes, there is no loss in the network, and A always tries to send full frames to C. For every packet that A sends, how many IP packets will cross the link from B to C? Group of answer choices 4 packets 3 packets 5 packets 6 packets