Which modern device was at one time constructed using cathode ray tubes.

The cathode ray tube was used to develop the oscilloscope and the television.

Explanation:

Cathode ray tubes are also known commonly as CRTs. Cathode ray tubes are still widely used in a number of electrical devices, such as computer screens, television sets, radar screens, and oscilloscopes

Answer is oscilloscope

The cathode ray tube was used to develop the oscilloscope and the television.

Hope this helps

the answer is d. give brainliest if right.

ps is this 7th grade civics?

the option which was not a function of missionaries in the northwest was the first one - they established posts for trading furs and other goods.

missionaries were sent around the world to spread religion and their knowledge and others - they were not merchants who sold furs and other goods.