Which answer choice is a complete sentence? The primary functions of the spleen are to filter blood and to serve as part of the immune system.

The primary function of the spleen is to filter blood and is also part of the immune system.

The primary function of the spleen is to filter blood it is also part of the immune system.

The primary function of the spleen is to filter blood; is also part of the immune system.

Which statement best describes how the first-person narration in fever 1793 engages readers? mattie's perspective on the city of philadelphia gives readers an understanding of why some residents are leaving for the country. mattie's perspective on the state of her family's business gives readers an understanding of the responsibility she feels. mattie's perspective on her grandfather's strong-headed opinions gives readers an understanding of the influence he has on her. mattie's perspective on the events of 1793 gives readers an understanding of the experiences and uneasiness of the time.