Final answer:
The experimental units in this experiment are females aged 30-35 years old who suffer from severe allergies, and the treatments used are the new allergy drug and placebo.
Step-by-step explanation:
The experimental units in this experiment are the females aged 30-35 years old who suffer from severe allergies. The treatments used are the new allergy drug and the placebo, which looks exactly like the new allergy drug. Therefore, the correct answer is A) Experimental units: Females 30-35 years old; Treatments: New allergy drug and Placebo.