Read the following email message. Complete the email by filling in the blanks. Select the best choice for each blank.

Hi Tom, I'm writing to update you on our new safari vehicle safety protocols. As the head guide, I want to make sure you're aware of all the features in our upgraded vehicles. First, make sure to point out to guests that we have 1...... for better wildlife viewing. For guest safety, we've installed 2...... and each vehicle is equipped with 3....... Remember that before each tour, you need to check 4....... In case of emergencies, we now have 5...... installed in every vehicle. Please review these features and let me know if you have any questions. Best regards, Sarah

Choose the best option.

The safari vehicles 1....... The vehicles are designed to 2....... The communication systems in the vehicles 3.......