Which of the following function checks to see if a field has no value?

A possible drawback of new versions of software is that files might not be backwardly ________ with existing files created with earlier versions of the software

Fill in the blank(s) with correct word

Saving an object group as a ________ image results in a good-quality picture with a smaller file size compared to other file types

A) PNG B) TIFF C) JPEG D) Bitmap