what is the best calcium magnesium vitamin d supplement?
['B- Bluebonnet Calcium Citrate Magnesium and Vitamin D3.', 'B- Solgar Calcium Magnesium with Vitamin D3.', 'C+ Rainbow Light Calcium Citrate Mini-Tablets.', 'C+ GNC Calcium Plus 1000.', 'C+ Kirkland Signature Calcium Citrate Magnesium and Zinc.', 'C+ Solaray Calcium Magnesium Zinc.', 'C Swanson Calcium Citrate & Vitamin D.']