What is the purpose of ".align 2" in the following data section? .data s1: .asciiz .align 2 s2: .space 4 "hi" .text main: la $t1, s1 la $t2, s2 loop: lbu $t5, ($t1) sb $t5, ($t2) beq $t5, $zero, exit addi $t1,$t1, 1 addi $t2, $t2, 1 j loop exit: li $v0, 10 syscall o it forces the assembler to use big-endian instead of little-endian placement it indicates that the assembler should skip two words it forces the assembler to place s2 on the next word boundary o it indicates that the assembler should skip two bytes