In many jurisdictions, the unlawful entry into a dwelling by a person who knows someone is present in the dwelling at the time of the entry, and who is armed with a dangerous weapon which he uses or threatens to use against someone inside the dwelling is considered the crime of:

a. intimidationb. extortionc. home invasiond. "strong arm" robbery

c. home invasion  

Explanation:

In many jurisdictions, the unlawful entry into a dwelling by a person who knows someone is present in the dwelling at the time of the entry, and who is armed with a dangerous weapon which he uses or threatens to use against someone inside the dwelling is considered the crime of home invasion. It is the forceful entry of an armed individual in an occupied home with the intent to commit crime.

1 and 2

explanation:

a factory opens that mass-produces light bulbs.

explanation:

not sure if that's an answer to your questions but this is an example! : )