A police detective investigating a threat traces the source to a house. The couple at the house shows the detective the only computer the family owns, which is in their son's bedroom. The couple states that their son is presently in class at a local middle school. How should the detective legally gain access to the computer?

a) Obtain a search warrant from a judge
b) Force entry into the house to search the computer
c) Request permission from the school to search the son's belongings
d) Request consent from the couple to search the computer