question: a man and his wife were once sitting by the door of their house, and they had a roasted chicken set before them, and were about to eat it together.
Capitalize this past sentence correctly.
A: A man and his wife were once sitting by the door of their house, and they had a roasted chicken set before them, and were about to eat it together.

question: 5) account password and security
Capitalize this past sentence correctly.
A: 5) Account Password and Security

question: anyone can buy a clamp meter and put their brand on it. only a few manufacturers design, build and test their own equipment to exceed international safety standards.
Capitalize this past sentence correctly.
A: Anyone can buy a clamp meter and put their brand on it. Only a few manufacturers design, build and test their own equipment to exceed international safety standards.