I'm pretty sure this is a false statement
Answer:
Through the period luminosity relation to Cepheid variables
Explanation:
The luminosity of a given Cepheid can be established when the period luminosity relationship is calibrated.
Their brightness is then used to find their distance
Answer: It's called the station model because it shows the weather measured at a particular weather station, or an area where the weather is measured. It lets meteorologists see a lot of information in a very small space. The symbols and numbers found there are the same across the world and have hardly changed in 75 years.
Explanation: trust me bro.
The answer to your question is d :)