When placing the receptor in the mandibular premolar region, the receptor must be placed the tongue. When inserting the receptor holder into the mouth, the receptor is tipped the tongue.

Under: away from

Explanation:

Radaiation paralleling technique gives an accurate and precise representation of the image of a tooth.

When placing the receptor in the mandibular premolar region, the receptor must be placed under the tongue. When inserting the receptor holder into the mouth, the receptor is tipped away from the tongue.

i think it is d. objects resist changes in their state of motion.