An example of an individual point of verification in a computerized application is

A.
An inference check.

B.
A boundary protection.

C.
A sensitive transaction.

D.
A check digit.

Explanation:
Checkdigit: A one-digit checksum.
Checksum: A computed value which depends on the contents of a block of data and which is
transmitted or stored along with the data in order to detect corruption of the data. The receiving
system recomputes the checksum based upon the received data and compares this value with the
one sent with the data. If the two values are the same, the receiver has some confidence that the
data was received correctly.
The checksum may be 8 bits (modulo 256 sum), 16, 32, or some other size. It is computed by
summing the bytes or words of the data block ignoring overflow. The checksum may be negated
so that the total of the data words plus the checksum is zero.