how to up the col grid in bootstrap - css

Question

i have 3 col in medium view in bootstrap shown in above image ie.
i want to achieve this type of view in small view is col-sm-*
my code is
<div class="col-md-8">
<div class="col-md-12">A</div>
<div class="col-md-12">C</div>
</div>
<div class="col-md-4">
<div class="col-md-12">B</div>
</div>
IN THIS way i can achieve my target in medium view but cant achieve in small view.how can i achieve the both view as well as in medium and small view as shown in image.

Answer 1

I suggest reading bootstrap css doc also this
But try this:
<div class="row">
<div class="all a col-sm-12 col-md-6">A</div>
<div class="all b col-sm-12 col-md-6">B</div>
<div class="clearfix"></div>
<div class="all c col-sm-12 col-md-6">C</div>
</div>
You can remove the <div class="clearfix"></div> if you don't care about the height mismatch
Here's a working jsfiddle

Answer 2

It's a bit of a stretch, but you could try this:-
<div class="col-md-8">
<div class="col-md-12">A</div>
<div class="col-md-12 visible-sm visible-xs">B</div>
<div class="col-md-12">C</div>
</div>
<div class="col-md-4 hidden-sm hidden-xs">
<div class="col-md-12">B</div>
</div>
Frankly, I can't think of any other solution using just HTML and CSS. Although, if scripts were involved, it would be a different case.

Answer 3

First of all, you shouldn't assign columns without rows, so you should have something like:
<div class="row">
<div class="col-md-8 col-xs-12">A</div>
<div class="col-md-4 pull-right col-xs-12">B</div>
<div class="col-md-8 col-xs-12">C</div>
</div>
So you pull right your B Div (therefore not clearing the next div, and spacing it out). And with col-xs-12 you assure that float won't be present in mobile.
Heres a pen
Now, if you want to remain with your code, I guess Shan answer is the best one.
Well, you could have the height of B and work with margins so the positioning go right, but that isn't considered best practices and could cause some bugs.