Bank Deposits That Are Repayable on Demand Are Considered to Be

Bank deposits that are repayable on demand are considered to be cash equivalents.
What is the movement in cash and cash equivalents according to IAS 7 Statement of cash flows for the year ended 31/12/X2
Seamus Ltd has the following assets and liabilities at 01/01/X2 and 31/12/X2:

A) Decrease of £3,420
B) Increase of £3,420
C) Increase of £12,300
D) None of the above