How do chemicals primarily enter the body during adhesive application?

The correct choice highlights the various routes through which chemicals can enter the body during adhesive application. Chemicals can indeed be absorbed through the mouth, eyes, and skin, making this option the most comprehensive and accurate.

Inhalation is a common route for exposure, but it is not the only one, as chemicals can also come into contact with the skin, leading to absorption, or be accidentally ingested if they come into contact with the mouth or are transferred from hands to the mouth. The eyes can also be a sensitive entry point for hazardous substances, which can cause irritation or harm. Therefore, recognizing that chemicals have multiple pathways into the body is crucial for understanding safety precautions necessary when handling adhesives and similar materials.