Tribeni had to travel 175 km in 3.5 hours. However, she travelled at the rate of 58 km/hr for 2.5 hours and then rested for 20 minutes before completing the journey. If Tribeni managed to reach on time, her speed during the last stretch would have been ________.

• A. 36 km/hr
• B. 30 km/hr
• C. 42.5 km/hr
• D. 45 km/hr