_____________ is the default file-open mode for an ofstream.

Infrared, a wireless connection used in the past prior to Bluetooth, was limited because it ________

A) required a direct line of sight between devices B) was not able to connect devices to the Internet C) was not managed correctly by its developer and therefore never became commercially successful D) only enabled two devices to connect

When using the View Side by Side feature, the maximum number of documents that you can display at one time is:

A) five. B) three. C) four. D) two.