__________ was developed by Phil Zimmermann and uses the IDEA cipher for message encoding.

What happens to most controls when the Enabled property is set to False?

a. The control responds to events generated by the user. b. The control can receive the focus c. The control appears grayed out, or dimmed d. The control does not appear

The _____ provides an expression that the node value should match.

Fill in the blank(s) with the appropriate word(s).