单选题 Stolzenbach Technologies has a target capital structure of 60 percent equity and 40 percent debt. The schedule of financing costs for the Stolzenbach is shown in the table below:

{{U}}Amount of New Debt (in millions){{/U}}	{{U}}After-tax Cost of Debt{{/U}}	{{U}}Amount of New Equity (in millions){{/U}}	{{U}}Cost of Equity{{/U}}
$0 to $199	4.5 percent	$0 to $299	7.5 percent
$200 to $399	5.0 percent	$300 to $699	8.5 percent
$400 to $599	5.5 percent	$700 to $999	9.5 percent

Stolzenbach Technologies has breakpoints for raising additional financing at both:

• A. $500 million and $1000 million.
• B. $400 million and $700 million.
• C. $500 million and $700 million.