Final answer:
Workers on farms must be warned about the location and description of treated areas, the pesticide used, and the pests present.
Step-by-step explanation:
On farms, any worker who might enter a treated area or walk within 1/4 mile of a treated area during application must be warned by:
a. Oral notification of location and description of treated area and/or posted warning signs
b. Oral notification of pesticide used
c. Oral notification of pest in treated areas
d. a and b
e. a and c
The worker must receive either oral notification of the location and description of treated area and/or posted warning signs, as well as oral notification of the pesticide used or the pest present in the treated areas. This ensures that workers are aware of potential exposure to pesticides and can take necessary precautions to protect their health.