Read the sentences. Climbers on Mount Everest must use special clothing and equipment. It's important for safety and security.

QUESTION: Select the sentence that correctly combines these sentences using colons and semicolons.

1 Climbers on Mount Everest must use special clothing and equipment; it's important for safety; and security.
2 climbers on Mount Everest must use special clothing and equipment; it's important for safety and security.
3 Climbers on Mount Everest must use special clothing and equipment, it's important for safety; and security.
4 Climbers on Mount Everest must use; special clothing and equipment, it's important for safety and security.