Final answer:
The MammaCare system for breast self-examination includes visual inspection and palpation technique; ultrasound is the safest medical imaging technique during pregnancy.
Step-by-step explanation:
The components of the MammaCare system for breast self-examination include visual inspection and palpation technique. This system does not incorporate thermal imaging as a part of its breast self-examination methodology. So, the correct answer to the question is (d) A and B.
When considering medical imaging techniques during pregnancy, it's crucial to use the safest options to protect the health of the mother and the developing fetus. Among the listed options, ultrasound technology is widely recognized as the safest because it does not use ionizing radiation and is the least invasive method. Consequently, for the question regarding the safest imaging study that can be used during pregnancy, the correct response is (c) ultrasounds.