vWhich of the following is not true about modifying table columns?

[A].	You can drop a column at any time.
[B].	You can add a column at any time as long as it is a NULL column.
[C].	You can increase the number of characters in character columns or the number of digits in numeric columns
[D].	You cannot increase or decrease the number of decimal places.

Answer: Option D

Explanation:

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