B. A baby is delivered before the 37th week of pregnancy.
A premature birth is a birth that takes place more than three weeks before the baby's estimated due date. In other words, a premature birth is one that occurs before the start of the 37th week of pregnancy. Premature babies, especially those born very early, often have complicated medical problems.
Answer: C Some one was here
Explanation: Was is past tense
<span> skeletal system and the muscular system,
Muscles are attached to the skeleton and work assuming that the skeleton is there - for example there is no muscle that makes sure you don't bend the middle of your arm, as it's stable because there is a bone in it. Basically, the skeleton is a scaffolding for the muscles
the skeletal system and the nervous system,
Many nerves run along the skeleton, or even inside the bones and the bones protect the nerves - for example in the spinal cord
the muscular system and the nervous system.
Nervous system controls the muscles! it sends them messages such as "move the muscle now" - and in fact the muscles are directly connected to the skeleton</span>
