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Will give 5 stars and brainliest to first right answer

Sam had a disease that weakened his heart so it
could not pump properly. This caused him to
have low energy because his cells couldn't get
the nutrients they needed. Based on this
information, Sam's disease primarily affected
the functions of which two systems?
•A. skeletal system and digestive system

B. muscular system and cardiovascular system

C. integumentary system and muscular system

D. excretory system and cardiovascular system

Thanks