The resistor receives the remaining voltage

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Problem: The resistor receives the remaining voltage
A 5.0 V source feeds a forward diode with constant 0.70 V drop and a 1.0 kΩ series resistor.
Question: Find the current.
Givens:
- Vs = 5.0 V
- Vd = 0.70 V
- R = 1000 Ω
Assumptions: DC steady state; ideal wires, a fixed 0.70 V forward drop and an ohmic resistor.
Choices (LaTeX):
A. 5.0\ \mathrm{mA}
B. 0.70\ \mathrm{mA}
C. 5.7\ \mathrm{mA}
D. 4.3\ \mathrm{mA}

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Tutoring approach:
Act as a patient physics tutor. Ask what I understand and what I have tried, then wait for my reply. Teach one step at a time; do not give the final answer or a complete solution immediately. Start with a physical picture. Define unfamiliar symbols and operators, explain signs and units, and state the model's assumptions. Give progressively stronger hints only when I need them. Ask me to predict a change before calculating it. When I finish, help me check dimensions and a limiting case, then ask one related transfer question. If information is missing or ambiguous, ask rather than inventing it. Distinguish exact results from approximations and acknowledge uncertainty.