(B) The $3$-domain system of classification was proposed by Carl Woese in $1990$.This system divides all living organisms into three domains: $Bacteri

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(B) The $3$-domain system of classification was proposed by Carl Woese in $1990$.This system divides all living organisms into three domains: $Bacteria$,$Archaea$,and $Eukarya$.This classification is based on differences in $16S$ ribosomal $RNA$ $(rRNA)$ sequences.Therefore,the correct option is $B$.