What is a certificate authority (CA)? This task contains the radio buttons and checkboxes for options. The shortcut keys to perform this task are A to H and alt+1 to alt+9.
A

A server that encrypts transactions between two parties, often an end user and a Web server
B

A system that mediates between a merchant and an acquirer
C

A server that generates digital certificates
D

A trusted third party that verifies the identity of anyone who has submitted a certification request (CR)

storage maybe?

are there options?

answer; numerous occupation(s);

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.

the major difference between the two is the objective and the reward of the game. candy crush has a puzzle theme with the objective of meeting a specific quota of points or objects, you are able to gain access to the next level and compete with peers on the process. on duolingo the objective is rather different, you are given sets of questions for you to answer for you to move to the next level and as for the reward, you are able to learn available language as this is an app developed to teach the user about other languages.