Which MS Access data type stores large text/numbers, and what is a subset of characters in a data field called?

Here are the answers to the questions:

1) In MS Access, which data type is appropriate to store large text and numbers?
(A) Large Text
(B) OLE
(C) Memo
(D) Text

The Memo data type (now called Long Text in newer versions of Access) is designed to store large amounts of text and numbers, up to 1 gigabyte.

The correct option is (C).
$\boxed{\text{(C) Memo}}$

2) A subset of characters within a data field is known as
(A) Byte
(B) File
(C) Record
(D) Data string

A data string is a sequence of characters. A subset of characters within a data field (which typically holds a string) would also be considered a string or substring.

The correct option is (D).
$\boxed{\text{(D) Data string}}$

3) Which of the following is not a valid Data Type in MS Access?

The options for this question are not visible in the image. Please provide the full list of options for a complete answer.