Answer
$-Advantages:\:Ensures\:representation\:of\:all\:key\:subgroups.\\-Disadvantages:\:Requires\:significant\:effort\:and\:can\:be\:complex\:to\:implement.$
Work Step by Step
$The\:major\:advantage\:of\:stratification\:is\:that\:it\:ensures\:$
$representation\:of\:all\:population\:subgroups\:that\:are\:important\:$
$to\:the\:study.\\There\:are\:major\:drawbacks\:to\:stratification;\:however,\:$
$first,\:if\:there\:are\:many\:variables\:of\:interest,\:dividing\:a\:large\:$
$population\:into\:representative\:subgroups\:requires\:a\:great\:deal\:$
$of\:effort.\:Second,\:if\:the\:variables\:are\:somewhat\:complex\:or\:$
$ambiguous,\:it\:is\:difficult\:to\:separate\:individuals\:into\:$
$the\:subgroups\:according\:to\:these\:variables.$
