For a 15-month-old toddler, who is being treated for acute lymphoid leukemia, there are vaccines contraindicated, especially if the child undergoing chemotherapy. For example, live vaccines such as varicella, oral polio, measles-mumps-rubella (MMR) and bacillus Calmette-Guérin (BCG) should not be given to children under chemo. Although, inactive vaccines may be fine but active vaccines should not be administered.
I would say either a or b because when dealing with stress you want to reflect on things you’ve done in the past and see how they resulted, but then it also helps to have the ability to laugh at yourself because it can make the situation less stressful. Hope that helped a little