Final answer:
Speed the Light (STL) is the organization dedicated to providing vehicles and equipment to missionaries, aiding them in their global efforts.
Step-by-step explanation:
The organization that provides vehicles and equipment for missionaries is b) STL (Speed the Light). STL is an initiative that was established by the Assemblies of God for the purpose of providing transportation and communication equipment to missionaries across the globe. While other organizations mentioned in the choices also provide support in various forms to missions or charitable efforts, STL is specifically known for its mission to equip missionaries with the vehicles and technology they need to spread their message and assist in their work.