If h(m+n) = m(h+r) find h in terms of m, n and r

• A.\(h=\frac{mr}{2m+n}\)
• B.\(h=\frac{mr}{n+m}\)
• C.\(h=\frac{m+n}{n}\)
• D.\(h=\frac{m+n}{m}\)
• E.\(h=\frac{mr}{n}\)