Systematic desensitization was developed in _____ and gradually exposes clients to _____ situations through the use of imagined scenes

In the Jewish tradition, the death of parents, sibling, spouses, or children is commemorated each year on the anniversary of the individual's death. What is the name of this custom?

a. Yahrzeit b. B'Shevat c. shiva d. Pesach

Which type of leukocyte attaches to an intruder and produces a specific antibody to attack the intruder's antigen?

a. Macrophage b. B cell c. T cell d. A cell