Question: When an 8 - bit or 1 6 - bit data is loaded from the data memory into a 3 2 - bit register, sign

When an 8-bit or 16-bit data is loaded from the data memory into a 32-bit register, sign extension or zero extension should be performed depending on the data is signed or unsigned.
a. LDRSB: load register with signed byte
b. LDRSH: load register with a signed halfword
c. LDRB: load register with a byte (unsigned).
d. LDRH: load register with a half-word (unsigned)

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