@CRIS1794 hello,
here is my answer for refer: C, C, True.
For the first question, device will send gratutious ARP packets periodically when it receives an ARP packet which destination IP is same with its own IP, but gratutious ARP packets would be sent periodically spontaneously.
For the second question option C, switch would learn the MAC address without send ARP packets.
By the way, it's better to solve these exam question yourself.