I believe the right answer would be C) monitor.
Monitor can be a noun; "I have many monitors."
Or a verb; "I'll be able to monitor that soon."
Do u have a picture of the sentences?
For an entrepreneur, there is no tax threshold. This means that there no entrepreneurs exempted from paying taxes. For an informal worker, the tax threshold is $9,275. This is also the tax threshold for a single employee. Reaching this income will result to a tax rate of 10%.