A.
"Just writing to let u know I'll be late."
✓
B.
"I am writing to inform you that I will be arriving approximately 15 minutes late for my shift today."
✓
C.
"Sorry, running late! See u soon."
✓
D.
"I will be tardy for my professional obligations this morning."
✓
A.
emergency situations
✓
B.
control groups in clinical trials
✓
C.
all surgical procedures
✓
