Упростите выражение \(\frac{8a^2b}{35c^4}\cdot5ac\) .

• \(\frac{8a^3b}{7c^3}\)
• \(\frac{8a^2b}{7c^4}\)
• \(\frac{8ab}{175c^5}\)
• \(\frac{8a^2b}{35c^4}\)