Breaking a current column in a document can be done by pressing Ctrl + Shift + Enter. Let's break down the answer and explain it in detail:

- Pressing Ctrl + Shift + Enter:
- This keyboard shortcut combination is used to break the current column in a document.
- By pressing these keys simultaneously, you can force the text to move to the next column or the next available space in the document layout.

Let's now analyze the other options and explain why they are not the correct answers:

- Press Alt + Enter:
- This keyboard shortcut is typically used in software applications like Microsoft Excel to create a line break within a cell or to edit the contents of a cell.
- However, it does not specifically address breaking a column in a document.

- Press Ctrl + Enter:
- This keyboard shortcut is commonly used to insert a page break in a document, forcing the content after the cursor to start on a new page.
- While it can help with organizing content, it does not specifically address breaking a column.

- Press Alt + Shift + Enter:
- This keyboard shortcut is often used in software applications like Microsoft Excel to enter a formula as an array formula.
- It does not relate directly to breaking a column in a document.

Therefore, the correct answer is option 'A' - Press Ctrl + Shift + Enter. This combination of keys is specifically designed to break the current column and move the text to the next available space in the document layout.