EF6 KME Ex69 #1, multiple solutions

Rhonda’s sister, a singer, sang the national anthem at the game last night.

Rhonda’s sister who is a singer sang the national anthem at the game last night.

Rhonda’s sister, who is a singer, sang the national anthem at the game last night.

Rhonda’s sister is a singer, and she sang the national anthem at the game last night.

Rhonda’s sister is a singer; in fact, she sang the national anthem at the game last night.

Becuase Rhonda’s sister is a singer, she sang the national anthem at the game last night.

I know that Rhonda’s sister, a singer, sang the national anthem at the game last night.