Options are:
[1]. protist
[2]. sharks
[3]. cows
[4]. lizards
[5]. mammals
[6]. viruses
[7]. crocodiles
[8]. bacteria
Given those answer options, answer the question: Fact 1: Chordates have a complete digestive system and a closed circulatory system. Fact 2: Yep, lizards are chordates, just like humans. Given the two facts above, what have a complete digestive system and closed circulatory system?
A:
[4].