As you're a user configure her e-mail over the phone, she remarks that the ip address is different than it was when she checked last week. this surprises her, since she didn't make any changes to her tcp/ip configuration. the user has had no problems running her web browser. you immediately know that: a. her ip address is static. b. her default gateway is dynamic. c. she is running internet explorer. d. her computer is a dhcp client.